Love this concept! I hosted a similarly open session and turned the result into an article on the topic. Here’s how we did it:

I opened the topic with a few PowerPoint slides, then informed the group that we would create the actual content together, then I would pull it all together into an article to be published. We identified problems and discussed solutions to the biggest ones.

Here’s the resulting article: http://www.learningsolutionsmag.com/articles/1449/better-elearning-agile-llama-and-lean